Moomintroll, Sniff and Little My set out to stop a comet approaching the Moominvalley. Along the way they meet Snufkin, the beautiful Snorkmaiden, Snork and Hemulen, who join them in their quest.

Minami Takayamaas Moomintroll (voice)
Ryusei Nakaoas Sniff (voice)
Rei Sakumaas Little My (voice)
Takehito Koyasuas Snufkin (voice)
Mika Kanaias Snorkmaiden (voice)
Akio Otsukaas Moominpappa (voice)
Ikuko Tanias Moominmamma (voice)
Yasuyuki Hirataas Snork (voice)
Minoru Yadaas Hemulen (voice)
Hisao Shirai